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diff --git a/ios/chrome/browser/updatable_config/updatable_config_base.h b/ios/chrome/browser/updatable_config/updatable_config_base.h
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+++ b/ios/chrome/browser/updatable_config/updatable_config_base.h
@@ -0,0 +1,63 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef IOS_CHROME_BROWSER_UPDATABLE_CONFIG_UPDATABLE_CONFIG_BASE_H_
+#define IOS_CHROME_BROWSER_UPDATABLE_CONFIG_UPDATABLE_CONFIG_BASE_H_
+
+#import <Foundation/Foundation.h>
+
+namespace net {
+class URLRequestContextGetter;
+}  // namespace net
+
+@protocol UpdatableResourceBridge;
+
+// Abstract base class for configurations bundled in a .plist file in
+// application bundle. Configuration is periodically updated by pulling
+// in a new configuration file from gstatic.com.
+// DO NOT use this class directly, but instantiate either UpdatableArray
+// or UpdatableDictionary class instead.
+// |startUpdate:| must be called for every subclass.
+@interface UpdatableConfigBase : NSObject
+
+// Initializes a new Updatable Config object using .plist file named |plistName|
+// which is in the application bundle. |appId| and |appVersion| are used to
+// derive the URL to update this plist from gstatic.com.
+// If |appId| is nil, a default value based on the application id from the
+// application bundle will be provided.
+// If |appVersion| is nil, a default value based on the application version
+// number from the application bundle will be provided.
+- (instancetype)initWithAppId:(NSString*)appId
+                      version:(NSString*)appVersion
+                        plist:(NSString*)plistName;
+
+// Starts periodic checks with server for updated version of
+// configuration plists
+- (void)startUpdate:(net::URLRequestContextGetter*)requestContextGetter;
+
+// Prevents any future update checks, and releases requestContextGetter. Should
+// be called if the app is going to terminate.
+- (void)stopUpdateChecks;
+
+// Performs any post-update operations for the updated data to take effect.
+- (void)resourceDidUpdate:(NSNotification*)notification;
+
+// Subclasses must override this method to return a UpdatableResourceBridge
+// object. The returned object determines whether the resource stored in the
+// file |resourceName| is of plist, json, or some other data file format.
+- (id<UpdatableResourceBridge>)newResource:(NSString*)resourceName;
+
+// Returns the internal resources object. This accessor is intended for
+// use by subclasses of this class and for unit testing only.
+// Note that this is really a readonly property for subclasses, but for
+// unit testing, the ability to set the resource is also needed.
+@property(nonatomic, retain) id<UpdatableResourceBridge> updatableResource;
+
+// Consistency check defaults to NO and is enabled only by Chrome application,
+// not unit or kif tests.
++ (void)enableConsistencyCheck;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_UPDATABLE_CONFIG_UPDATABLE_CONFIG_BASE_H_